Diabrotica virgifera
In 3 days ~10% in a week ~30%
Diabrotica virgifera is a species of beetle in the family Chrysomelidae. It is an agricultural pest species that attacks maize. It includes two subspecies, Diabrotica virgifera virgifera (the western corn rootworm) and Diabrotica virgifera zeae (the Mexican corn rootworm). Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Western Corn Rootworm sighting in Vienna on a given day, based on 29 verified sightings from GBIF citizen-science data. It is the 471st most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report a Western Corn Rootworm in Vienna on a given day, against under 5% in September to June, the lowest months. Those are among Vienna's wettest months, with about 85 mm of rain a month against 40 mm in February.
Among the best
Of the 7 cities where we can rate Western Corn Rootworm sightings, Vienna ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Kyiv (Ukraine, under 5%).
Same family: Chrysomelidae
The closest relatives of the Western Corn Rootworm that you can see in Vienna (family Chrysomelidae, Leaf Beetles) are Colorado Potato Beetle (about 10%), Willow Clytra (about 10%) and Cassida nebulosa (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western Corn Rootworm is recorded against all the insects logged in Vienna (29 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
